What must be done to the following half-reactions before they can be added together? mn (s) → mn 2+ (aq) + 2e − fe 3+ (aq) + 3e − → fe (s)double the mn half-reaction and triple the fe half-reaction. add h+ ions to the left-side of the mn reaction. triple the mn half-reaction and double the fe half-reaction. double the mn half-reaction. none of the above

Triple the Mn half reaction and double the Fe half reaction

Explanation:

Because...we have to balance the number of electrons(e)...which will be eliminated from the equations and they will be combined

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.